What is the conversation about?
A. Having a birthday party.
B. Friends getting together.
C. Buying a skirt.
What gift does Mary receive from her grandmother?
A lovely dog.
B. A new shirt.
C. A fine skirt.
What does Mary not do according to the conversation?
A. Give gifts.
B. Make a wish.
C. Blow out the candles.
慢性肺源性心脏病最常见的病因是（）
A. 支气管扩张症
B. COPD
C. 肺小动脉栓塞
D. Ⅳ型肺结核
E. 严重的胸廓畸形
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